From 3dc377bed50396dd5566d5d3fce0da3816e3e057 Mon Sep 17 00:00:00 2001
From: Brian Holt <bholt@dwolla.com>
Date: Tue, 6 Jun 2023 12:58:19 -0500
Subject: [PATCH] discover node executable with nvm, if possible

---
 .nvmrc                              |  1 +
 project/AsyncUtilsBuildPlugin.scala | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 .nvmrc

diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 000000000..a77793ecc
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+lts/hydrogen
diff --git a/project/AsyncUtilsBuildPlugin.scala b/project/AsyncUtilsBuildPlugin.scala
index a159a38a9..8d9dc1e74 100644
--- a/project/AsyncUtilsBuildPlugin.scala
+++ b/project/AsyncUtilsBuildPlugin.scala
@@ -2,6 +2,9 @@ import _root_.scalafix.sbt.ScalafixTestkitPlugin.autoImport.*
 import _root_.scalafix.sbt.{ScalafixPlugin, ScalafixTestkitPlugin}
 import com.typesafe.tools.mima.plugin.MimaPlugin
 import com.typesafe.tools.mima.plugin.MimaPlugin.autoImport.*
+import org.scalajs.jsenv.JSEnv
+import org.scalajs.jsenv.nodejs.NodeJSEnv
+import org.scalajs.sbtplugin.ScalaJSPlugin.autoImport.*
 import org.typelevel.sbt.TypelevelMimaPlugin.autoImport.*
 import org.typelevel.sbt.gha.GenerativePlugin.autoImport.*
 import org.typelevel.sbt.mergify.MergifyPlugin
@@ -109,6 +112,7 @@ object AsyncUtilsBuildPlugin extends AutoPlugin {
           "org.typelevel" %% "cats-tagless-core" % CatsTaglessV,
         ) ++ (if (scalaVersion.value.startsWith("2")) scala2CompilerPlugins else Nil)
       },
+      jsEnv := nvmJsEnv.value,
     )
     .jvmPlatform(Scala2Versions)
     .jsPlatform(Scala2Versions)
@@ -123,6 +127,7 @@ object AsyncUtilsBuildPlugin extends AutoPlugin {
           "org.typelevel" %% "cats-effect" % CatsEffect3V,
         ) ++ (if (scalaVersion.value.startsWith("2")) scala2CompilerPlugins else Nil)
       },
+      jsEnv := nvmJsEnv.value,
     )
     .dependsOn(`async-utils-core`)
 
@@ -328,6 +333,18 @@ object AsyncUtilsBuildPlugin extends AutoPlugin {
      */
     githubWorkflowScalaVersions := Seq("2.13"),
     githubWorkflowBuildSbtStepPreamble := Nil,
+
+    nodeExecutable :=
+      scala.util.Try {
+        import scala.sys.process.*
+
+        Process("bash" :: "-c" :: ". $HOME/.nvm/nvm.sh --no-use && nvm which" :: Nil)
+          .lineStream
+          .last
+      }
+        .toOption
+        .map(file),
+    nvmJsEnv := new NodeJSEnv(nodeExecutable.value.map(_.getAbsolutePath).foldLeft(NodeJSEnv.Config())(_ withExecutable _))
   )
 
   override def extraProjects: Seq[Project] = autoImport.allProjects
@@ -336,4 +353,7 @@ object AsyncUtilsBuildPlugin extends AutoPlugin {
     def %(vav: Version): ModuleID =
       oan % vav.toString
   }
+
+  private lazy val nvmJsEnv: TaskKey[JSEnv] = taskKey("use nvm to find node")
+  private lazy val nodeExecutable: TaskKey[Option[File]] = taskKey("path to Node executable for JS tasks")
 }